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SC1403ITSTR Arkusz danych(PDF) 15 Page - Semtech Corporation

Numer części SC1403ITSTR
Szczegółowy opis  Mobile Multi-Output PWM Controller with Virtual Current SenseTM
PDF  30 Pages
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Producent  SEMTECH [Semtech Corporation]
Strona internetowa  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1403ITSTR Arkusz danych(HTML) 15 Page - Semtech Corporation

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 2002 Semtech Corp.
www.semtech.com
SC1403
POWER MANAGEMENT
PRELIMINARY
Applications Information (Cont.)
Measured overall gain & phase response of the single-pole com-
pensation using SC1403 is plotter below.
Table I. Recommended compensation cap for different output
capacitance.
Table I. is useful only if the following ESR condition is satisfied.
fo > 50KHz
where Resr is the equivalent ESR of the total output caps.
-20
0
20
40
60
80
100
120
140
160
180
1.00E+02
1.00E+03
1.00E+04
1.00E+05
f (Hz)
-80
-45
-10
25
60
1.00E+02
1.00E+03
1.00E+04
1.00E+05
f (Hz)
Transient responses of the switcher using single-pole compensa-
tion are shown below. The load steps from 0A to 3A and 3A to 6A.
The applied di/dt is 2.5A/usec
O
ESR
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C
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